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. 2018 Nov 19;140(48):16418–16422. doi: 10.1021/jacs.8b10247

Figure 3.

Figure 3

Characterization of two-electrode PEC cell consisting of IO-TiO2|FDH cathode wired to IO-TiO2|dpp|POs-PSII tandem photoanode. (a) Representative stepped-voltage chronoamperometry (0.1 V voltage steps with 30 s dark and 30 s light cycles) of the fully assembled PEC cell (red trace). Control experiments in the absence of PSII (green and black traces) and without FDH (blue and black traces) are also shown. Applied voltage (Uapp) values are shown on top of the traces. (b) CPE (Uapp = 0.3 V) of the two-electrode PSII-FDH system (red trace) and a similar system in the absence of FDH (blue trace). Conditions: CO2/NaHCO3 (100 mM), KCl (50 mM), 1 atm CO2, pH = 6.5, T = 25 °C, continuous stirring. Simulated solar light source: AM 1.5G filter; Ee = 100 mW cm–2; λ > 420 nm.